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attenuation half-thickness
biol.	Halbwertschichtdicke f (half-value layer, half-value thickness, first, second, ...); Halbwertschicht f (half-value layer, half-value thickness, first, second, ...); Halbwertdicke f (half-value layer, half-value thickness, first, second, ...); Schwächungshalbwertschicht f (half-value layer, half-value thickness, first, second, ...); Schwächungshalbwertdicke f (half-value layer, half-value thickness, first, second, ...); Halbwertschicht für Schwächung (half-value layer, half-value thickness, first, second, ...); dicke für Schwächung (half-value layer, half-value thickness, first, second, ...); Halbwertsschicht f (half-value layer, half-value thickness, first, second, ...); Halbwertsdicke f (half-value layer, half-value thickness, first, second, ...); Halbwertsschichtdicke f (half-value layer, half-value thickness, first, second, ..., erste, zweite ...)